With Generic Scan Tool

Evaporative Emission (EVAP) canister purge regulator valve 1, checking

Solenoid valve is closed when no voltage is present.

Recommended special tools and equipment
- VAG1526 multimeter or VAG1715 multimeter
- VAG1594 connector test kit
- Wiring diagram

Test requirements





- The respective fuses of Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- must be OK:
- Fuel Pump (FP) Relay -J17- must be OK, check:
- Ground (GND) connections between engine and chassis must be OK.
- Ignition switched off.

Test sequence

Vehicles with engine code APH




- Disconnect 2-pin connector from Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- (arrow).

Vehicles with engine code AWP, AWV, BKF, BNU




- Disconnect 2-pin connector from Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- (arrow).

Continuation for all vehicles

Checking resistance




- Measure resistance between terminals of solenoid valve.
Specified value: 22.0 to 30.0 ohms

If specified value is not obtained:
- Replace Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-.
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

If specified value is obtained:
- Check wires to control module according to wiring diagram.

Check wires to control module
- Connect test box to control module wiring harness

Vehicles with engine code APH




- Check wire between test box and 2-pin connector for open circuit according to wiring diagram.
terminal 2 + socket 64
Wire resistance: max. 1.5 ohms

Vehicles with engine code AWP, AWV, BKF, BNU




- Check wires between test box and 2-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
terminal 2 + socket 64
Wire resistance: max. 1.5 ohms

Continue for all vehicles

- Check the wire for short circuit to B+ and Ground (GND).
Specified value: Infinite Ohms

- Check wire between 2-pin connector terminal 1 and the Fuel Pump (FP) Relay -J17- for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms

- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

If no malfunctions are found in wires:
- Replace Motronic Engine Control Module (ECM) -J220-.